This cheat will give you unlimited ships in the game.
[CGA]
Make sure "CGASHOOT.EXE" is in your current sub-directory,
then type from the DOS prompt:
ren cgashoot.exe cgashoot.cht
debug cgashoot.cht
e 6da e9 10 1
w
q
ren cgashoot.cht cgashoot.exe
[EGA]
Make sure "EGASHOOT.EXE" is in your current sub-directory,
then type from the DOS prompt:
ren egashoot.exe egashoot.cht
debug egashoot.cht
e 70b eb 7
w
q
ren egashoot.cht egashoot.exe
